KNOWN ISSUES 3513544: Performance degradation...

I see that version 3.1 of the Microsoft Drivers for PHP for SQL Server was published on 12/12/2014 and is available on
http://www.microsoft.com/en-us/download/details.aspx?id=20098. Thank you Microsoft...
One thing that bothered me though is the "Known issue" described at the end of the release.txt file included in the SQLSRV31.EXE package:
KNOWN ISSUES
"3513544: Performance degradation when using Microsoft Drivers 3.1 for PHP for SQL Server with Windows 7/Windows Server 2008 R2 and previous versions. Clients connecting to supported versions of Microsoft SQL Server may notice decreased performance when
opening and closing connections in a Windows 7/Windows Server 2008 R2 environment. The recommended course of action is to upgrade to Windows 8/Windows Server 2012 or later."
Has anybody experienced that "decreased performance when opening and closing connections" problem on Windows Server 2008 R2? If you have, how bad is it?
And are there any solutions - other than the "recommended course of action" ("upgrade to Windows 8/Windows Server 2012 or later")? In a corporate environment upgrading a OS isn't always a simple thing that you do in a few minutes. It can
take weeks or months of planning and testing...

As I googled, apparently there are less articles mentioned this issue. On the worst surmise， MS may just drive you to upgrade :P
I don't find a specific document on this, this may be a better question on a dedicated PHP forum.

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